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W5500 Datasheet(PDF) 22 Page - WIZnet Co., Ltd

Part # W5500
Description  Microcontroller
PDF  66 Pages
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Manufacturer  WIZNET [WIZnet Co., Ltd]
Direct Link  https://www.wiznet.io/ko/Product/
Logo WIZNET - WIZnet Co., Ltd

W5500 Datasheet(HTML) 22 Page - WIZnet Co., Ltd

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W5500 Datasheet Version1.0.9
1 Byte READ Access Example
When the Host reads the ‘Socket Status Register(S7_SR) of the Socket 7’s Register
Block by using VDM mode, the data is read with the SPI Frame below. Let’s S7_SR to
‘SOCK_ESTABLISHED (0x17)’.
Offset Address = 0x0003
BSB[4:0]
= ‘11101’
RWB
= ‘0’
OM[1:0]
= ‘00’
1st Data
= 0x17
The External Host asserts (High-to-Low) SCSn signal before transmitting SPI Frame,
then the Host transmits Address and Control Phase to W5500 through the MOSI signal.
Then the Host receives Data Phase from the MISO signal.
After finishing the Data Phase receives, the Host de-asserts SCSn signal (Low-to-
High). (Refer to the Figure 12)
Figure 12. S7_SR Read in VDM Mode
SCSn



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